G'day All, Can anyone point me in the direction of a DOS-based QRS keyer? I was browsing and found a link to one in a file called "qrs.zip". Unfortunately, the link didn't respond. To make things wor
As requested by Peter G3LDO, I have now added a facility to CWSLOW (was SLOWCW) to increase the inter character gap lengths slightly to improve readability when using Gram software etc. One additiona
Some of you may have heard me making funny noises on 136. This has been a test of my PSK31 equipment. I can now produce about 200W or so of the stuff which is about 6dB down on my normal level but pr
produces 250W key-down (PEP) and obviously shows less average when sending PSK31 due to the holes in it! Do you intend to use BPSK or QPSK? Any other parameters I should set? I have copied several st
On Friday Evening I called G3YXM on PSK31 after hearing him on test mode. Dave was just able to make out my callsign and a few other words and sent me a report of 53. My Copy of Dave was near perfect
If I may I should like to ask one very important and practical question, is it possible to make contacts effectively at 160 kHz with a proposed antenna which would only be about 25 feet high and abou
Hi All Just found out that the Motorola DSP 56002 EVM Board ia availble from Farnell for £114 plus VAT. This is considerably cheaper than the last time I enquired about its price so have ordered anot
For anyone who built the PIC based DSP interface (April 1997 RadCom) you have suitable recording hardware to hand. Just feed the AGC voltage conditioned to 0 - 5 Volts directly to the PIC input pin -
I don't know what "dwell" really means in this topic but I think it's the time of data collection and folding/averaging in background. What means "smoothing"? In time or frequency domain? If it means
I advised the operator that we tend to assume a receive IF bandwidth of 250 Hz and generally aim to maintain a 300 Hz separation from other stations. (I believe that 300 Hz has been the figure quoted
I am a member of the Expert Group put together, predominantly by the RSGB, to look at the issue of Power Line Telecommunications. The results of our findings hvae been well reported in the EMC column
Rik - I have the means to monitor the 16kHz signal continuously at a very low sampling rate, ie 3.90625 Hz plus multiples higher, and store several hours of I/Q sampled raw data to disc. From these s
There is one saving feature if AGC cannot be turned off. If the signal to noise is low, say 10db or worse, then you can at least mesaure S/N using this technique. The technique may not necessarily be
In a previous EMail, Rik Strobe stated that the frequency of the GBR transmission had moved from 16kHz to 15.75kHz. This figure was in error. The actual frequency is centred on 15.98 kHz ie 20 Hz low
In a previous EMail, Rik Strobe stated that the frequency of the GBR transmission had moved from 16kHz to 15.75kHz. This figure was in error. The actual frequency is centred on 15.98 kHz ie 20 Hz low
Apologies if this has been sent twice, but I have a suspicion the firewall software on the other EMail account is playing up and delaying things. Now I know a few copies of PSK08 are out there I'll t
I find that rather impossible to believe - 300m of thick cable being a dummy load at 137kHz ! Go back to the fundamental equations and calculate properly rather than rely on tables and software used
MSF has been off as well, just as I wanted to do some long duration frequency calibration tests, and the 16kHz and 22 kHz (alledged) submarine transmissions. According to the National Physical Labora
Which shows that the processing by eye is about as good as the processing by a good CW ear about 10dB S/N in their respective bandwidths. I think I would agree with the 30 Hz effective ear bandwidth
